Electricity: motive power systems – Motor-reversing
Patent
1988-07-12
1990-11-13
Shoop, Jr., William M.
Electricity: motive power systems
Motor-reversing
318282, H02P 122
Patent
active
049704460
ABSTRACT:
A motor-powered opening/closing apparatus includes a circuit for detecting a constrained state of a motor as a power source of a window or a door and deenergizing the motor, and a circuit for detecting clamping of a foreign object between an edge of the window or the door and a fixed frame and stopping or reversing rotation of the motor. These circuits are independently arranged to detect clamping of the foreign object with high sensitivity while a closing force at the closed position can be kept large.
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Kabushiki Kaisha Riken
Shoop Jr. William M.
Wysocki A. Jonathan
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